TurboTax for Business - State eFiling Transmission Loop

When trying to transmit my Delaware state return through TurboTax for Business, I am stuck in a loop where "we need to make one more check".

I have validated all my inputs are correct, however after each pass through the validations and resubmission - I am met with the same "we need to make one more check" response.

I've seen the same issue in this community dating back several years, so am frustrated to see this is something that hasn't been resolved to my knowledge.

Is my only course of action calling the intuit support line?